A Hybrid Technique for Combining the Moment Method Treatment of Wire Antennas With the GTD for Curved Surfaces.
OHIO STATE UNIV COLUMBUS ELECTROSCIENCE LAB
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The hybrid technique presented in this paper is a method for solving electromagnetic problems in which an antenna or other discontinuity is located on or near a conducting body, such as antennas on ships or aircraft. The technique solves these kinds of problems by properly analyzing the interaction between the antenna or scatterer and the conducting body. The hybrid technique accomplishes this by casting the antenna structure in a moment method format then modifying that format to account for the effects of the conducting body via the geometrical theory of diffraction. The technique extends the moment method to handle many problems that cannot be solved by GTD or the moment method alone. In general, arbitrary radiators located on or near canonical shapes or combinations thereof can be solved using the hybrid technique. Electromagnetic parameters for which the hybrid technique can solve include the near and far fields, current distributions, impedances, and scattering data. In this paper, wire antennas are analyzed to find their input impedance when they are located near perfectly-conducting circular cylinders. The purpose of this paper is to present the technique and demonstrate some of its facility and its accuracy.
- Electrical and Electronic Equipment
- Numerical Mathematics
- Radiofrequency Wave Propagation